dupe
Concise Oxford English Dictionary © 2008 Oxford University Press:
dupe/djuːp/
▶verb deceive; trick. ▶noun a victim of deception.
– derivatives
dupable adjective,
duper noun,
dupery noun.
dupable adjective,
duper noun,
dupery noun.
– origin C17: from Fr. dial. dupe ‘hoopoe’, from the bird's supposedly stupid appearance.
'dupe' also found in these Oxford entries:

